Monoblastiaceae Acrocordia salweyi Growth type crustose Chemical reactions negative Occurs on soft, damp calcareous rocks and walls with old mortar. Smooth or granular, thin, immersed, whitish to pale brown-grey thallus. Large, +/- flat-topped apothecia with thick involucrellum, one quarter to half immersed. The spores are 1-septate, 20-35 x 10-15 µm. Microscope photographs below. Similar: A. conoidea. Pinkish thallus, smaller spores. On hard limestone

Microscope photographs



Acrocordia salweyi
Lytchett Heath and Wimborne, Dorset. February 2014, 2017